Patent GB-359781-A (GB)
Title: Improvements in machines for filling and closing bags
IPC: B65B43/58
Filed: 1930-12-04
Abstract: 359,781. Making, filling, and closing bags. HESSER MASCHINENFABRIKAKT.-GES., F., 99, Olgastrasse, Cannstatt, Stuttgart, Germany. Dec. 4, 1930, No. 36552. Convention date, Dec. 17, 1929. [Classes 94 (i) and 94 (ii).] Making bags. The machine is shown diagrammatically in plan in Fig. 1, and bags are made from two blanks, fed severally from piles 206, 207 by stamps which may be formed with ledges adapted to apply adhesive at places necessary for the subsequent adhesion of the various folds. The sheet from the pile 206 is first drawn to position L<1> and then superposed upon a sheet from pile 207 at position L<2>. Both sheets are brought beneath a mandrel 205, about which they are folded to form a bag in any suitable manner. A stripper transfers the bag to position L<3> from which transfer mechanism moves it into a pocket 10 of a rotary conveyer wheel 212, rotated in synchronism with the operations of the bag-making apparatus. Filling apparatus. The pockets 10 of the wheel are formed as open-sided troughs, facing outwards, with vertically-movable baseplates 12, Fig. 4, and a rail 11a, Fig. 1, to constitute the fourth side. The baseplates 12 are retained in any desired vertical position by the mechanism such as is described in Specification 36553/30, and shown in Fig. 4. After having been fed at position I, Figs. 1 and 3, the first intermittent rotation of the wheel 212 takes the bag to position II for filling. During this travel, the releasing bolt 18 runs up on a rail 21, and, at the same time, a notch 22 is engaged by a rail 24 adapted to be vertically reciprocated so as to shake the bag during filling, which may be effected by any suitable device. During the subsequent travel of the bag to position V, the release bolt is held up by the rail 21, and. shaking is imparted by a rail 27, which forms a continuation of the rail 24. At position V, the rod 13 and baseplate 12 are raised by spring action so that the filled bag is moved up until the top surface of the contents is aligned and pressed by a plunger which comes down to the desired position, the catch 15 retaining the bag in this position for the subsequent top folding operations. At this position, a card may be placed on the surface of the contents. Closing apparatus. The top folding operations take place at positions VI, VII, VIII, and are commenced by the action of a folding plate 61a, Fig. 8, mounted on a pedestal 50 and adapted to move radially inwards to make the fold l<1>, Fig. 17. The plate is caused to move down into the plane of the fold by the interaction of a cam-surface 58 on the bracket 56 carrying it, with a roller 59, with which the bracket is held in contact by a spring 60. The bracket also carries lateral folding plates 62, 62a, which, on the completion of the fold l<1>, turn down into a horizontal position to turn out the portions l<2> to form the flaps l<3>, l<4>, Fig. 18. Upon the return movement of the folders 61a, 62, 62a, a roller 74b is moved into the position shown at 75a, Fig. 8, to roll the folded parts smooth, and a plate 69 is lowered to press the folds. At position VII, triangular plates 80, Fig. 11, apply adhesive to the flaps l<3>, l<4> which are supported during the application by horizontal extensions 10d, 10e of the pockets 10. A plate 90 with sharp edges is turned down upon the top of the bag to define the folds on which the flaps l<3>, l<4> are to be turned over before a plate 81, by a clockwise circumferential movement, turns over the flap l<3> during the progress of the bag from position VII to position VIII. A plate 240, accommodated in a slot 81c in the plate 81, keeps down the folds of the oncoming packets. The last fold is made by a pivoted flap 85 which rides up into position over a rail 82a carried by the arm 81a. The completely closed packet passes away beneath a spring-pressed plate 86. At position VIII a label is affixed and the packet is conveyed to delivery mechanism 251, Fig. 1, the catch 15 being released by a rail to allow the plate 12 to drop. Between positions VIII and I the plate is positively aligned at its lower level by the action of a rail.